Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The arrival of December indicates a decrease in the average high-temperature, moving from a cool 51.8°F (11°C) in November to a wintry 42.1°F (5.6°C). Rocky Hill witnesses a consistent average low-temperature of 30.9°F (-0.6°C) throughout December.Humidity
The average relative humidity in December in Rocky Hill is 81%.Rainfall
In December, in Rocky Hill, the rain falls for 10 days. Throughout December, 1.26" (32mm) of precipitation is accumulated. Throughout the year, there are 124.7 rainfall days, and 13.74" (349mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Rocky Hill. In Rocky Hill, Ohio, in December, during 5.5 snowfall days, 0.75" (19mm) of snow is typically accumulated. In Rocky Hill, Ohio, during the entire year, snow falls for 26.7 days and aggregates up to 4.37" (111mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Rocky Hill.On the first day of December, sunrise is at 7:30 am and sunset at 5:08 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 5:18 pm EST.
Sunshine
The average sunshine in December is 4h.UV index
The months with the lowest UV index in Rocky Hill are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, a regular UV index of 2 translates into these guidelines:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
Is it cold in Rocky Hill during December?
What is the average humidity in December in Rocky Hill?
How much does it rain in Rocky Hill in December?
How much does it snow in Rocky Hill in December?
What is the month with the shortest days in Rocky Hill?
What is the average length of the day in December in Rocky Hill?
What time are sunrise and sunset in December in Rocky Hill?
How many hours of sunshine does Rocky Hill have in December?
What is the month with the lowest UV index in Rocky Hill?
What is the UV index reading in December in Rocky Hill?
Average temperature in December
Rocky Hill, OH
- Average high temperature in December: 42.1°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in December
Rocky Hill, OH
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Rocky Hill, OH
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Rocky Hill, OH
- Average humidity in December: 81%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are August and September (75%).
Average rainfall in December
Rocky Hill, OH
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (1.57").
The driest months (with the least rainfall) are September and November (0.75").
Average rainfall days in December
Rocky Hill, OH
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in December
Rocky Hill, OH
- Average snowfall in December: 0.75"
The month with the highest snowfall is February (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Rocky Hill, OH
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rocky Hill, OH
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Rocky Hill, OH
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (21.6 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in December
Rocky Hill, OH
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Rocky Hill, OH
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Rocky Hill, OH
- Average visibility in December: 5mi
The months with the highest visibility are March, April, October and November (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and December (5mi).
Rocky Hill, Ohio, USA
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